The tender little dumplings called gnocchi (pronounced nyo-kee) are said to have originated in the Middle East before showing up in ancient Rome. Gnocchi may be made with semolina, flour, potatoes, spinach, ricotta or in any combination. The dough is formed, cut, boiled and then topped with a sauce or herbed butter. These three Long Island restaurants know their gnocchi. SACRAMONE'S, East Meadow...